UPDATE: Isabella has been located alive and well
Tasmania Police have concerns for the welfare of Perth woman Isabella Cassidy, 18, who has not been seen since Saturday morning.
Ms Cassidy, nickname Izzy, was last seen at 9.30am on Saturday in Perth.
She is described as 5 foot 6, average build, short brown hair, and was last wearing a light blue zip-up jacket and grey slip-on shoes.
Police report Ms Cassidy has an intellectual disability.
If anyone has seen or knows where Isabella Cassidy is, contact the Police Assistance Line (non-emergencies) on 131 444.
Information can be provided anonymously by calling Crime Stoppers on 1800 333 000 or online at crimestopperstas.com.au